I'd say around $1000 just for the bonnet.
What should really be done though especially with that colour is blend it out into the surrounding panels, even with a colour matcher who's spot on with their work, the guards will look different to the bonnet, I can just about guarantee it.
I just had a new tailgate and bumper installed on my ute (alto grey) and it took 3 attempts for the panel beaters to blend it out close enough into the rear 1/4s that you couldn't tell it had been repaired.
Unfortunately it's a common misconception especially with metallic paints that you can just give a panel shop your paint code and get a bonnet thats the perfect match to the rest of the car.
This is why insurance jobs even for minor fender benders take a while because it's not just about painting that panel, it's about making sure that panel looks like it's supposed to be there.